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Functional Anatomy > Exam #3 - Lumbosacral Musculature > Flashcards

Exam #3 - Lumbosacral Musculature Flashcards

1
Q

Primary ligaments of the Sacroiliac Joint (4)

A
  1. Anterior sacroiliac
  2. Iliolumbar
  3. Interosseous
  4. Short & long sacroiliac
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2
Q

Secondary ligaments of the Sacroiliac Joint (2)

A
  1. Sacrotuberous
  2. Sacrospinous
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3
Q

What happens to the Nucleus Pulposus during flexion & extension

A

Flexion: Deformed or pushed posteriorly

Extension: Deformed or pushed anteriorly

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4
Q

What happens to the Annulus Fibrosus during flexion & extension

A

Flexion: Posterior side stretch

Extension: Anterior side stretch

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5
Q

What happens to the Apophyseal Joint during flexion & extension

A

Flexion: Capsule stretch / Minimizes articular contact / Articular loading decreases

Extension: Capsule slackened (neutral ext only) / Maximizes articular contact area (neutral ext only) / Articular loading increased

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6
Q

What happens to the Intervertebral Foramen during flexion & extension

A

Flexion: Widened

Extension: Narrowed

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7
Q

What happens to the Posterior Longitudinal Ligament during flexion & extension

A

Flexion: Increased tension (elongated)

Extension: Decreased tension (slackened)

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8
Q

What happens to the Ligamentum Flavum during flexion & extension

A

Flexion: Increased tension (elongated)

Extension: Decreased tension (slackened)

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9
Q

What happens to the Interspinous Ligament during flexion & extension

A

Flexion: Increased tension (elongated)

Extension: Decreased tension (slackened)

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10
Q

What happens to the Supraspinous Ligament during flexion & extension

A

Flexion: Increased tension (elongated)

Extension: Decreased tension (slackened)

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11
Q

What happens to the Anterior Longitudinal Ligament during flexion & extension

A

Flexion: Decreased tension (slackened)

Extension: Increased tension (elongated)

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12
Q

What happens to the Spinal Cord during flexion & extension

A

Flexion: Increased tension (elongated)

Extension: Decreased tension (slackened)

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13
Q

Primary Function: Contributes to rotation

Stabilizing Function: Creates tension, increases intra-abdominal pressure, activates with “drawing-in” maneuver

A

Transverse Abdominis

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14
Q

Primary Function: Pelvic hiking & side bending of spine

Stabilizing Function: Frontal & sagittal plane stability, stabalize ribs against diaphragm during inspiration, stability to lumbar vertebrae

A

Quadratus Lumborum

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15
Q

Primary Function: Spinal extension & contralateral rotation

Stabilizing Function: Stabalizes spine against flexion & rotation & contralateral side flexion, stability to lumbar vertebrae, activated with “drawing-in” & bracing for spinal stabilization

A

Multifidus

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16
Q
  1. Approximates spinous processes
  2. Increases Intra-abdominal pressure
  3. Creates a ridged column due to muscular activation
A

Thoracolumbar fascia

17
Q
  • A girdle-like cylinder of muscular support is produced as a result of
    the coactivation of the TA, multifidus, and the thick thoracolumbar fascia
  • Combined with global muscle activation = increase spinal stiffness
A

Bracing mechanism

18
Q

Structure: Erector Spinae, Sacrotuberous Lig, Ischial Tuberosity, Biceps Femoris

Function: Creates extension & hyperextension

Dysfunction: Creates an ipsilateral anterior & posterior tilted SIJ & translated femoral joint, knee pain, & ankle sprains

A

Deep Longitudinal Sling

19
Q

Structure: Ipsilateral rhomboids/latissimus/thoracolumbar fascia & Contralateral gluteus maximus

Function: Force closure & significant to load transfer through pelvic gridle during rotational activities, counterbalance, power & percision for gait, striking & throwing

Dysfunction: Rotated SIJ & abducted scapula, hamstring strains

A

Posterior Oblique Sling

20
Q

Structure: Ipsilateral Pect Major/Serratus Ant./External Oblique, Ant. Oblique Fascia, Contralateral Internal Oblique/Hip Adductor mm

Function: Contralateral counterbalance, power & percision for acceleration/deceleration, gait & throwing, force closure to pubic symphysis

Dysfunction: Groin strains, sports hernia, breathing issues

A

Anterior Oblique Sling

21
Q

Structure: Ipsilateral gluteus medius & minimus/adductors/TFL, Contralateral quadratus lumborum

Function: Frontal plane stability, mediates force to maintain upright torso during heel strike, creates lateral flexion of spine, hip abd, brake against lateral & rotational movements of trunk, significant for pelvic gridle during standing/walking

Dysfunction: Laterally tilted pelvis, IR & anterior shifted femur or abducted femoral head

A

Lateral Sling

22
Q

Abdominal muscles that reinforce & stabilize the sacroiliac joint (4)

A
  1. Rectus abdominis
  2. Obliquus abdominis internus
  3. Obliquus abdominis externus
  4. Transverse abdominis
23
Q

Hip extensor muscles that reinforce & stabilize the sacroiliac joint (2)

A
  1. Biceps femoris
  2. Gluteus maximus
24
Q

Muscles that reinforce & stabalize the sacroiliac joint (7)

A
  1. Erector spinae
  2. Lumbar multifidi
  3. Abdominal mm
  4. Hip extensor mm
  5. Latissimus dorsi
  6. Iliacus
  7. Piriformis
25
Q

Levator Ani muscles (3)

A
  1. Pubococcygeus
  2. Puborectalis
  3. Iliococcygeus
26
Q

Function of Levator Ani muscles (5)

A
  1. Increase intra-abdominal pressure
  2. Provide rectal support
  3. Inhibit bladder activity
  4. Support pelvic organs
  5. Assist in lumbar stability
27
Q

Lumbopelvic Cylinder Capsule

  • Inferior wall -
  • Superior wall -
  • Posterior wall -
  • Anterior/Lateral wall -
A
  • Inferior wall - pelvic floor
  • Superior wall - diaphragm
  • Posterior wall - multifidus
  • Anterior/Lateral wall - transverse abdominis
28
Q

All walls of the cylinder must be activated and taut for optimal trunk ____ to occur with all static and dynamic activties

A

optimal trunk stabilization

29
Q

Clinically: the process of transverse abdominis contraction

A

diaphragmatic breathing

Functional Anatomy (17 decks)

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